I agree with timing being part of the issue. You should not have to crank an engine long once you have fuel at the carbs. Its not starting for a reason. Sometimes you need another set of eyes on a situation of just double check everything.
SWEET Sergeant At Arms: Old Dominion Stovebolt Society BUNS?!?!?!Where we're going, we don't need no buns..... 1950 GMC 450 1951 Chevy 1/2-Ton The GreenMachine In the Stovebolt Gallery